Have one's back against (to) the wall--陷入困境

ICRT English in the News by ICRT/Jane Lee

To be in a bad or high-pressure situation in which one's choice or ability to act is limited; to have very serious problems that limit the ways in which you can act 面臨糟糕的情境，可以採取的對應措施極少(背抵著牆，沒有退路。)